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Finding the Fourth Proportional to 7,287.78, 10,913.13 and 4,818.90

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Solution

The fourth proportional to 7,287.78, 10,913.13 and 4,818.90 is: 7,216.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,287.78 : 10,913.13 = 4,818.90 : x
  2. Step 2: Convert to fraction form
    7,287.78/10,913.13 = 4,818.90/x
  3. Step 3: Cross multiply
    7,287.78x = 10,913.13 × 4,818.90
  4. Step 4: Simplify right side
    7,287.78x = 52,589,282.16
  5. Step 5: Solve for x
    x = 52,589,282.16/7,287.78
  6. Step 6: Final answer
    x = 7,216.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.